Electric heater.



- F. B. SHAILOR.

H ELEGTRIG HEATER.

APPLIOATIOH TILED JULY 12,1909;

950,058. P atentedFeb. 22, 1910.

9" 1 1: I N- L. 2 E 2 'IZTZZ 11237555755" JNTUB.

W-\ FRANK E: EHAILDZZ.

ATTK

UNITED STATES, PATENT curios.

FRANK E. SHAILOR, OF DETROIT, MICHIGAN, ASSIGNOR TO GENERAL ELECTRIC vCOMPANSQA CORPORATION OF NEW YORK. I

' ELECTRIC HEATER.

Specification of Letters Patent.

Patented Feb. 22, 1910.

Application filed July 12, 1909. Serial No. 507,030.

To'aZZ whom it may concern:

Be it known that I, FRANK E. SHAILOR, a citizen of the United States,residing at Detroit, county of \Vayne, State of Michigan, have inventedcertain new and useful Improvements in Electric Heaters, of which thefollowing is a specificatioi'i.

This invention relates to electric heating devices and has for itsobject the provision of an improved cooking-utensil of the type in whichthe cooking is entirely done by radiant heat.

My invention relates more specifically tocooking devices in the" natureof a toasting device, although it is evident that broiling may be doneon a device of similar (lGSlgl'l. In the application of Parkhurst,436,620, filed Nov. 20, 1908, there is described and claimed a device ofthis character in which the heating element consists of coils of barehigh resistance wire arranged vertically on a base and surrounded by ametallic ,cage. This cage has a pocket on each'side for receiving thematerial to be toasted. The coils are held in place by having theirlower ends fixed to the base, while the upper end of the coil isfastened to an insulator secured to the top of the cage. I have foundthat the coils may be arranged in a much more rigid manner by windingthe resistance wire upon a core or support of insulating material andsecuring the support to the base. I have also found that the structuremay berendered more rigid by tapering the coils from one end and havingthe large end at the bottom.

Other objects of my invention will appear in the course of the followingspecification,

, in which I have shown my invention embodied in concrete form forpurposes of illustration. T

In the accompanying drawings, disclosing my invention, Figure 1represents a front elevation of an electric toaster embodying myinvention; and Fig. 2 represents the end 'view ofthe same. 7 I

Referring to the drawings, 10 represents a base, preferably ofinsulating material,

, such as porcelain, slate or the like. This base is rectangular in formand has mounted on it along a central longitudinal line the heatingunits 11. .These units each consist of an insulating support 12 of somematerial such for instance as mica or the like, upon which is mountedthe high resistance conductor 13. The mica support is fixed in a slot inthe projection 14 on the base. The

previously formed resistance conductor is placed over this support, hasits lower end connected with the terminal 15, while the upper end passesthrough'the insulator 16. This insulator 16 forms one of a series ofinsulators mounted in the wire frame '17, secured to the upper portionof the incl-osing cage'18. This cage is formed of wires 19 which areW-sha ed, as indicated in the drawing. The wires are held together bytransverse wires 20 and 21 and united by hard solder or welded-to form arigid structure. The bottom wires are bent as indicated at 22 and loopedso as to be engaged bv bolts 23 for fastening the frames together. Theoutside wires of the W-turns form the pockets in which the bread isplaced to be toasted. The resistance wire 13 may be of any desiredmaterial, but I have found that the wire covered by the patent 'toDempster, No. 901,428, is very well adapted for this purpose. The wiremay be preliminarily heated to form a thin film of insulating oxid, butthis is not so essential, since the wire is wound upon an insulatingbase and cannot be short circuited ,upon itself. The resistance coilsare all connected in series as shown; the wire frdm the first coil 13passes through insulator 16, then down through the next insulator to thesecond coil, the second coil is connected with the other coil at thebase and the third coil passes through the insulator down into thefourth coil as before. These wires are then connected to terminal pins24. The unit being" tapered is much stronger and the mica support onwhich the wire is wound prevents the wire from sagging when heated andshort circuiting upon itself or'presenting an unsightly appearance. Themica being transparent permits the entire coil to be seen and inaddition absorbs heat and becomes an auxiliary source of radiant heatproducing a very uniform heating effect which is especially desirable insuch operations as toasters or broilers.

While I have described my invention as embodied in concrete mechanismfor the purpose of illustration, it should be understood that I do notlimit my invention thereto, since various modifications thereof willsuggest themselves tothose skilled in the art without departing from thespirit of my invention, the scope of which is set forth in the annexedclaims.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is,

1. An electric cooking utensil comprising a plurality of high resistancecoils of bare Wire Wound upon an insulating support, a base for holdingthe same in a vertical position, and a metal cage provided with basketsat the sides for inclosing said coils.

2. An electric cooking utensil comprising a pulrality of high resistancecoils of bare Wire wound upon an insulating support, a

base for holding the supports in a vertical position, a metal cageprovided With baskets at the sides for inclosing said coils, andinsulators in the upper part of said cage for supporting the coils.

An electric cooking utensil comprising a plurality of high resistancecoils of bare wire Wound upon a tapered insulating support,'a base forholding the supports in-a vertical position, and means for supportingthe upper end of the coils.

4. An electric cooking utensil comprising a plurality of high resistancecoils of bare Wire Wound upon a tapered insulating support, a base forholding the supports in a vertical position, a metal cage provided withbaskets at the sides for inclosing said coil, and insulators in theupper part of said cage for supporting the coils.

5. An electric cooking utensil comprising a plurality of high resistancecoils of bare Wire Wound upon a tapered insulating support, a base forholding said supports in a vertical position, a metal cage for inclosingsaid coil, and insulators in the upper part of said cage for supportingthe coils.

6. A radiant heater comprising a plurality of vertical heating units,each comprising a coil of resistance Wire supported by a tapering micastrip.

7. An electric cooking utensil comprising a high resistance coil of barewire Wound upon an insulating support, a base for holding the same in avertical position, and a metal cage provided With baskets at the sidesfor inclosing said coil.

8. An electric cooking utensil comprising a high resistance coil of bareWire Wound upon a tapered insulating support, a base for holding thesupport in a vertical position, and means for supporting the upper endof the coil.

9. An electric cooking utensil comprising a high resistance coil of bareWire Wound upon a tapered insulating support, a base for holding thesupport in a vertical position, a metal cage provided with baskets atthe sides for inclosing the coil, and insulators in the upper part ofsaid cage for supporting the coil.

In Witness whereof, I have hereunto set my hand this 26th day of June,1909.

' FRANK E. SHAILOR.

Witnesses:

LEO PORDEN, CHAS. RUSCHKA.

